• Journal of the Korean Society for information Management
• /
• v.19 no.4
• /
• pp.322-348
• /
• 2002

The purpose of the study is to suggest and measure the ways to activate the use of wireless internet services in university libraries. For this, 1 reviewed the concepts and characteristics of wireless internet and investigated both local and foreign cases on wireless internet service of university libraries, library users' usage status, and their demands. Based on the case study and survey results, I suggest the strategic consideration and active publicity of university libraries, the introduction of the services students more prefer, the development of differentiated menus from ordinary wire internet services, and the consistent financial support of the university authority.

• Journal of Convergence Society for SMB
• /
• v.4 no.3
• /
• pp.15-20
• /
• 2014

Wireless network is convenient as compared to the wire, and it is also easy. Therefore, SMEs in the country is the trend that many SMEs prefer the radio using a lot of radio as an extension of the wired network modification felt the burden of fixed installations. Wireless networks are vulnerable to security together than a wired network, since it passes the packet through the broadcasting. Therefore, analyzing the vulnerability of wireless networks, and proposes countermeasures about wireless network security in small and medium-sized businesses.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.9 no.3
• /
• pp.661-668
• /
• 2005

This paper designs and implements wire/wireless web service system based on SOAP for price comparison dynamically using web service technoloies in real time. This web service system composes web service client module including functions of product search, product sort, product order and UDDI retrieval browser, and server module including functions of remote procedure call for product search/order and functions of UDDI publish browser, and mobile client module supporting functions for product search/order in wireless environments. This web service system can exchange product information based on SOAP messages and support independence of platform and flexible portability in environment conforming to SOAP, WSDL and UDDI standards.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2004.05b
• /
• pp.557-560
• /
• 2004

In this paper, wireless internet services are combined with conventional wire internet service system. These system support that instrument manager can be access his instrument by use personal mobile devices and instrument manager can be take emergency action by use mobile devices. for this, error signal of local instruments are transmitted to the serial port of local server through Rf wireless communication channel. Also, The image of local instruments are transmitted to the web monitoring screen of main server. Network Camera System Supports remote monitoring functions. The interfacing of nam server with external user are possible through the mobile devices.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.1
• /
• pp.33-38
• /
• 2012

In this paper, helical wave wire have been proposed as the vehicle connector for the wireless access in vehicular environments(5.925GHz) communication. This helical slow wave connector is design by considering the properties of critical parameter like helical mean radius, helical pitch, helical wire radius and distance of helical wire to shield. The design simulation and results can be used to determine the most suitable helical wave wire dimensions for vehicle communication connector. The optimized WAVE connector inserted the helical wave wire has insertion loss less than -0.76dB at 5.925GHz. It provides 31% of insertion loss with good performance. Therefore, the simulated results can be effectively used for optimum design of high frequency connector for vehicle communication.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.5 no.2
• /
• pp.141-156
• /
• 2009

As the TCP is the protocol designed for the wired network that packet loss probability is very low, because TCP transmitter takes it for granted that the packet loss by the wireless network characteristics is occurred by the network congestion and lowers the transmitter's transmission rate, the performance is degraded. The Snoop Protocol was designed for the wired network by putting the Snoop agent module on the BS(Base Station) that connect the wire network to the wireless network to complement the TCP problem. The Snoop agent cash the packets being transferred to the wireless terminal and recover the loss by resending locally for the error occurred in the wireless link. The Snoop agent blocks the unnecessary congestion control by preventing the dupack (duplicate acknowledgement)for the retransmitted packet from sending to the sender and hiding the loss in the wireless link from the sender. We evaluated the performance in the wired/wireless network and in various TCP versions using the TCP designed for the wired network and the Snoop designed for the wireless network and evaluated the performance of the wired/wireless hybrid network in the wireless link environment that the continuous packet loss occur.

• Journal of IKEEE
• /
• v.8 no.2 s.15
• /
• pp.224-232
• /
• 2004

Because vehicles increases very rapidly by elevation of people living standard since 1995 years, become parking space of residential street poorly and most vehicles is doing unlawfulness parking to two faces road. So, was placed popular enmity and administration's difficulty by operation of system that have been enforcing Resident Priority Parking System in each ward office since 1996 years, but is not computerized. In this paper examines about GIS technology, wire and wireless communication technology, character recognition technology etc. that is base technology necessary to Design and Implementation Wire and Wireless Integrated System for Resident Priority Parking System. Explain main process, That is registration, assignment, control, traction process. And see execution appearance of implementation system. Operation of integrated system is considered very rapidly regulation illegal parking and Illegal parking expect on the decrease.

• Journal of Internet Computing and Services
• /
• v.3 no.2
• /
• pp.87-95
• /
• 2002

Due to rapid development of high speed wire/wireless internet technologies, at the current age, it cares into being one phenomenon that the internet business is able to work on anyplace and anytime. In this environment, a technology of mobile agent provides very useful mechanism for personal handheld devices because of supporting migration as autonomously executable software object Instead of users. Therefore, this paper focuses on Implementing a mobile agent platform for personal handheld devices, which supports mobile agents in wire/wireless internet environment. To do this, we construct the system with modified JAMAS, based on Java, in our previous research. Based on our proposed system, we implement the browsing application in personal handheld devices to access the MIB(Management Information Base) on SNMP(Simple Network Management Protocol), which supervises network environment on wire/wireless internet. This proposed application system is easily to access the MIB managed by SNMP agent. then provides network map viewer and updates the MIB through the browser to network administrator. As a result, we can support application area of mobile agents such as hare network management. M-Commerce, integration of remote database systems, active message and active network with personal handheld devices.

• Proceedings of the KSME Conference
• /
• 2007.05a
• /
• pp.1087-1090
• /
• 2007

A wireless magnetic torque sensor is utilized to measure the torque generated in the rotating shaft in magnetic field without connecting to the shaft by any wire. In this study, a new wireless magnetic torque sensor was introduced. The structure of the sensor was explained detailed as well as its operation principle. Resulting from the torque measurement experiment results, the sensor was proven to measure the generated torque effectively. Compared with traditional contact torque sensor, the wireless one has low cost and good environment adaptation ability. Moreover, the intractable wrapping wires around the shaft are removed in this design. Hence the wireless torque sensor may be expected as a possible sensing device for many applications, such as the electric assisting rotation system in automobiles, the torque sensing system in motors, the arm rotation system in robotics and so on.

• Proceedings of the IEEK Conference
• /
• 2007.07a
• /
• pp.181-182
• /
• 2007

Wireless home theater and speaker system was designed. That has 20W output per channel, 0.1% THD (Total Harmonic Distortion) and automatic algorithm avoiding noise. The 3D stereophonic sound was realized through the wireless 5.1channel speaker system designed. That could be secured 0.4% improvement effect of THD compared with wire speaker systems. Specially in transfer sound with wireless, Frequency Hopping Spread Spectrum was superior than Direct Sequence Spread Spectrum in household electric appliances and wireless internet environment that radiated noise similar with ISM Band using 2.4GHz.